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The weighting can be specified so that each point reflects the average EPA-regulated
facility, blockgroup, block, place on the map, or US resident."><meta property="og:description" content="Get data.table of Random Points (lat lon) for Testing/ Benchmarking/ Demos, weighted in various ways.
The weighting can be specified so that each point reflects the average EPA-regulated
facility, blockgroup, block, place on the map, or US resident."><meta property="og:image" content="https://usepa.github.io/EJAM/logo.svg"></head><body>
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      <img src="../logo.svg" class="logo" alt=""><h1>Random points in USA - average resident, facility, BG, block, or square mile</h1>
      <small class="dont-index">Source: <a href="https://github.com/USEPA/EJAM/blob/HEAD/R/testpoints_n.R" class="external-link"><code>R/testpoints_n.R</code></a></small>
      <div class="d-none name"><code>testpoints_n.Rd</code></div>
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    <div class="ref-description section level2">
    <p>Get data.table of Random Points (lat lon) for Testing/ Benchmarking/ Demos, weighted in various ways.
The weighting can be specified so that each point reflects the average EPA-regulated
facility, blockgroup, block, place on the map, or US resident.</p>
    </div>

    <div class="section level2">
    <h2 id="ref-usage">Usage<a class="anchor" aria-label="anchor" href="#ref-usage"></a></h2>
    <div class="sourceCode"><pre class="sourceCode r"><code><span><span class="fu">testpoints_n</span><span class="op">(</span></span>
<span>  n <span class="op">=</span> <span class="fl">10</span>,</span>
<span>  weighting <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/c.html" class="external-link">c</a></span><span class="op">(</span><span class="st">"frs"</span>, <span class="st">"pop"</span>, <span class="st">"area"</span>, <span class="st">"bg"</span>, <span class="st">"block"</span><span class="op">)</span>,</span>
<span>  region <span class="op">=</span> <span class="cn">NULL</span>,</span>
<span>  ST <span class="op">=</span> <span class="cn">NULL</span>,</span>
<span>  validonly <span class="op">=</span> <span class="cn">TRUE</span>,</span>
<span>  dt <span class="op">=</span> <span class="cn">TRUE</span></span>
<span><span class="op">)</span></span></code></pre></div>
    </div>

    <div class="section level2">
    <h2 id="arguments">Arguments<a class="anchor" aria-label="anchor" href="#arguments"></a></h2>


<dl><dt id="arg-n">n<a class="anchor" aria-label="anchor" href="#arg-n"></a></dt>
<dd><p>Number of points needed (sample size)</p></dd>


<dt id="arg-weighting">weighting<a class="anchor" aria-label="anchor" href="#arg-weighting"></a></dt>
<dd><p>word indicating how to weight the random points (some synonyms are allowed, in addition to those shown here):</p>
<p>Note the default is frs, but you may want to use pop even though it is slower.</p><ul><li><p>pop or people (slow) = Average Person: random person among all US residents (block point of residence per 2020 Census)</p></li>
<li><p>frs or facility = Average Facility: random EPA-regulated facility from actives in Facility Registry Service (FRS)</p></li>
<li><p>bg = Average Blockgroup: random US Census block group (internal point like a centroid)</p></li>
<li><p>block = Average Block: random US Census block (internal point like a centroid)</p></li>
<li><p>area or place = Average Place: random point on a map (internal point of avg blockgroup weighted by its square meters size)</p></li>
</ul></dd>


<dt id="arg-region">region<a class="anchor" aria-label="anchor" href="#arg-region"></a></dt>
<dd><p>optional vector of EPA Regions (1-10) to pick from only some regions.</p></dd>


<dt id="arg-st">ST<a class="anchor" aria-label="anchor" href="#arg-st"></a></dt>
<dd><p>optional, can be a character vector of 2 letter State abbreviations to pick from only some States.
#' @examples
mapfast(testpoints_n(300, ST = c('LA','MS')) )</p></dd>


<dt id="arg-validonly">validonly<a class="anchor" aria-label="anchor" href="#arg-validonly"></a></dt>
<dd><p>return only points with valid lat/lon coordinates. Defaults to TRUE.</p></dd>


<dt id="arg-dt">dt<a class="anchor" aria-label="anchor" href="#arg-dt"></a></dt>
<dd><p>logical, whether to return a data.table (DEFAULT) instead of normal data.frame</p></dd>

</dl></div>
    <div class="section level2">
    <h2 id="value">Value<a class="anchor" aria-label="anchor" href="#value"></a></h2>
    <p>data.frame or data.table with columns lat, lon in decimal degrees, and
any other columns that are in the table used (based on weighting)</p>
    </div>

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